Objective: Hypertension is a low-grade infammation state of the disease and was easily complicated by kidneys’ infammatory response. Mangiferin(MGF), a pharmacologically active compound in various plants including Ma...Objective: Hypertension is a low-grade infammation state of the disease and was easily complicated by kidneys’ infammatory response. Mangiferin(MGF), a pharmacologically active compound in various plants including Mangifera indica, has a strong anti-infammatory activity. However, the effects of MGF on renal infammatory injury in spontaneously hypertensive rats(SHRs) remain unclear. The purpose of this study was to investigate the protective effects and mechanisms of MGF on renal infammatory injury in SHRs.Methods: MGF was used in SHRs at the doses of 10, 20, 40 mg/kg/d for 8 weeks consecutively. The blood and urine were collected for assessment of renal function. Renal tissues were collected for histological,immunohistochemistry, ELISA, Western blot and real time reverse transcription PCR(RT-PCR) analysis.Results: The results showed that the levels of interleukin 6(IL-6), tumor necrosis factor-a(TNF-a), monocyte chemoattractant protein-1(MCP-1) and recombinant chemokine C-C-Motif receptor 2(CCR2) were increased in SHRs, meanwhile, the level of IL-10 was decreased in SHR. Treatment of MGF inhibited the expression of IL-6, TNF-a, MCP-1 and CCR2, and promoted the expression of IL-10. Furthermore, the content of blood urea nitrogen(BUN) and serum uric acid(SUA) was significantly increased in the model group, and treatment of MGF had no obvious effects on these parameters at all dose levels.Conclusion: Our study proved that the kidneys of SHRs had significant infammatory injury, and MGF had the protective effects on renal infammatory injury in SHRs;The protective mechanism may be mediated partly by the MCP-1/CCR2 signaling pathway. Thus, it is a potential new drug for the treatment of hypertension.展开更多
目的:观察电针对颈椎病大鼠椎间盘软骨细胞及MCP-1/CCR2信号通路的影响。方法:将45只雄性SD大鼠,按照随机数字表法分为3组,假手术组、模型组和电针组,每组15只。除假手术组外均建立动静力失衡性颈椎病模型,并于造模后3个月开始电针干预...目的:观察电针对颈椎病大鼠椎间盘软骨细胞及MCP-1/CCR2信号通路的影响。方法:将45只雄性SD大鼠,按照随机数字表法分为3组,假手术组、模型组和电针组,每组15只。除假手术组外均建立动静力失衡性颈椎病模型,并于造模后3个月开始电针干预双侧颈夹脊穴,30 min/次,1次/d,14 d为1个疗程。研究中通过电子透射电镜观察颈椎间盘软骨细胞的形态判定颈椎病造模是否成功;而后采用免疫组化检测颈椎间盘软骨细胞中肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)的表达情况;接着采用实时聚合酶链式反应(Real time PCR)检测MCP-1/CCR2信号通路,观察电针对MCP-1/CCR2信号通路的影响。结果:1)假手术组的颈椎间盘软骨细胞表面较光滑,可见微绒毛样凸起,细胞整体形态上类似椭圆形,细胞核形态类似一个肾脏,且细胞核完整无破损,染色质均匀;而细胞外的基质中含有丰富且排列有序的胶原纤维;模型组中的颈椎间盘软骨细胞出现退行性改变,其细胞表面的微绒毛样凸起明显减少,细胞核破损,染色质明显固缩,细胞外基质中的胶原纤维明显减少,排列无序。提示颈椎病造模成功。2)与假手术组比较,模型组和电针组大鼠TNF-α和IL-6表达均较密集,阳性表达增多( P <0.05),其中是电针组TNF-α和IL-6表达明显较模型组降低( P <0.05),提示电针能够抑制颈椎病大鼠椎间盘软骨细胞的TNF-α和IL-6表达。3)与假手术组比较,模型组和电针组颈椎间盘中MCP-1/GAPDH和CCR2/GAPDH均增高,差异有统计学意义( P <0.05);电针组与模型组比较,颈椎间盘中MCP-1/GAPDH和CCR2/GAPDH低于模型组,差异有统计学意义( P <0.05)。结论:电针可以抑制颈椎病大鼠椎间盘软骨细胞中TNF-α和IL-6表达,可能与抑制MCP-1/CCR2信号通路的激活有关。展开更多
基金supported by Natural Science Foundation of Guangxi Province (No. 2013GXNSFAA019114)Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Project (No. 12-071-08)。
文摘Objective: Hypertension is a low-grade infammation state of the disease and was easily complicated by kidneys’ infammatory response. Mangiferin(MGF), a pharmacologically active compound in various plants including Mangifera indica, has a strong anti-infammatory activity. However, the effects of MGF on renal infammatory injury in spontaneously hypertensive rats(SHRs) remain unclear. The purpose of this study was to investigate the protective effects and mechanisms of MGF on renal infammatory injury in SHRs.Methods: MGF was used in SHRs at the doses of 10, 20, 40 mg/kg/d for 8 weeks consecutively. The blood and urine were collected for assessment of renal function. Renal tissues were collected for histological,immunohistochemistry, ELISA, Western blot and real time reverse transcription PCR(RT-PCR) analysis.Results: The results showed that the levels of interleukin 6(IL-6), tumor necrosis factor-a(TNF-a), monocyte chemoattractant protein-1(MCP-1) and recombinant chemokine C-C-Motif receptor 2(CCR2) were increased in SHRs, meanwhile, the level of IL-10 was decreased in SHR. Treatment of MGF inhibited the expression of IL-6, TNF-a, MCP-1 and CCR2, and promoted the expression of IL-10. Furthermore, the content of blood urea nitrogen(BUN) and serum uric acid(SUA) was significantly increased in the model group, and treatment of MGF had no obvious effects on these parameters at all dose levels.Conclusion: Our study proved that the kidneys of SHRs had significant infammatory injury, and MGF had the protective effects on renal infammatory injury in SHRs;The protective mechanism may be mediated partly by the MCP-1/CCR2 signaling pathway. Thus, it is a potential new drug for the treatment of hypertension.
文摘目的:观察电针对颈椎病大鼠椎间盘软骨细胞及MCP-1/CCR2信号通路的影响。方法:将45只雄性SD大鼠,按照随机数字表法分为3组,假手术组、模型组和电针组,每组15只。除假手术组外均建立动静力失衡性颈椎病模型,并于造模后3个月开始电针干预双侧颈夹脊穴,30 min/次,1次/d,14 d为1个疗程。研究中通过电子透射电镜观察颈椎间盘软骨细胞的形态判定颈椎病造模是否成功;而后采用免疫组化检测颈椎间盘软骨细胞中肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)的表达情况;接着采用实时聚合酶链式反应(Real time PCR)检测MCP-1/CCR2信号通路,观察电针对MCP-1/CCR2信号通路的影响。结果:1)假手术组的颈椎间盘软骨细胞表面较光滑,可见微绒毛样凸起,细胞整体形态上类似椭圆形,细胞核形态类似一个肾脏,且细胞核完整无破损,染色质均匀;而细胞外的基质中含有丰富且排列有序的胶原纤维;模型组中的颈椎间盘软骨细胞出现退行性改变,其细胞表面的微绒毛样凸起明显减少,细胞核破损,染色质明显固缩,细胞外基质中的胶原纤维明显减少,排列无序。提示颈椎病造模成功。2)与假手术组比较,模型组和电针组大鼠TNF-α和IL-6表达均较密集,阳性表达增多( P <0.05),其中是电针组TNF-α和IL-6表达明显较模型组降低( P <0.05),提示电针能够抑制颈椎病大鼠椎间盘软骨细胞的TNF-α和IL-6表达。3)与假手术组比较,模型组和电针组颈椎间盘中MCP-1/GAPDH和CCR2/GAPDH均增高,差异有统计学意义( P <0.05);电针组与模型组比较,颈椎间盘中MCP-1/GAPDH和CCR2/GAPDH低于模型组,差异有统计学意义( P <0.05)。结论:电针可以抑制颈椎病大鼠椎间盘软骨细胞中TNF-α和IL-6表达,可能与抑制MCP-1/CCR2信号通路的激活有关。
